Friction shock-absorbing means.



G.A.1oHNsoN.

FRIOTION SHOCK ABSORBING MEANS.

APPLICATION FILED MAR. I2. 1918. Y

Patented Jan; 7,1919.

IIIIQ VI.

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onirica GEORGE A. JOHNSON, OF CHICAG, ILLINOIS, ASSIG-NO TO WILLlAlV H. LWIINER, 0F

CHAZY, NEW YGEK. i

FRICTION SHGCK-ABSORBING MEANS.

tpplication filed March 1%, 1918.

To UZ'Z whom, t may concern: y l

Be it known that l, Geenen A. JoIrNsoN, a citizen of the United States. residingr at Chicago, in the county ol (look and State ol illinois. have invented a certain new and useful improvement in Friction Shock-Absorbing Means, oi' which the following: is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specificat1on.

This invention relates to improvements in friction shock absorbing means. y

The object ot' the invention is to provide a friction shock absorbing; mechanism, more particularly designed for railway draft gears and wherein large lric'tion wearing areas are provided and the parts so de' signed as to be readily and cheaply manufactured in the forni of castings.

ln the drawing forming a part ot' this specification` ltigure 1 is a part elevational view, lpart longitudinal, vertical section ol aportion ol a railway car showing my in1- provenients in connection therewith. Fig. 2 is a vertical. transverse, sectional view, taken substantially on the line .2-2 of Fig. la And Fig. 3 is a perspective view of one ol the followers employed with my improve-- ments.

ln said drawing, 10---10 denote channel 'shaped center or draft sills of a railway car to which are secured front and rear stops 1l and l2 in the nsual manner. The

' draw bar 13 of the draft, rigging is operatively associated with the friction meehanisrn proper by any suitable means, such as the yolre 14 and the parts may be supported as bv saddle plate l5.

The improved shoclr absorbing mechanism proper, asshown, includes a front follower A, rear follower A", wedges .l-lli` outer or side lriction member -C, bolts lw-l) and springs E-E 5 The followers fia-Af are made duplicate and each consists of a follower portion proper lil and an inwardly extending heavy flange 17 of a width corresponding to the width of the follower0 ollset from the center of the follower` as clearly appears from ig. 1` so as to bring the opposing; friction surfaces 1818 of the two followers in sliding contact with each other on the center line or axis of the tneer. The lianges 1l are overlapped to the Specification of Letters Patent.

Said flange 17 is' Patented lana l, 1919.,

Serial No. 221,906.

extent indicated inv Fig. l, the spaces between the ends of said flanges 17 and the opposed followers being eqnal'to the perinissible movement ot the gear so that said flanges 17 will act as limiting stopsv to determine the relative approach el the fol lowers AMA.

rl`he wedges B are all similar and are of substantially right-angle triangular forma tion. Each Wedge B has an inclined Wedge surface 19 and an inner friction face 20 ein tending; parallel to the axis ott the gear and adapted to cooperate with the corresponding outer lriction tace 2l of one of the flanges 1l'. The wedges B are arranged as clearly shown in Fig". l, that is, there are tivo wedges lB on each follower. one ot' which I lits within the corner formed by the Hangs 17 and the main portion ot the follower, and the other bearing against the follower portion proper and seated on the `flange l'l et the opposed l'olloivern The enter or side friction members Cif-G are n'edgreshaped at each tendaasrfindicated at 2Q- 22. and cooperate with the Wedge laces 19 of the Wedges ll-lla The arrange :nent is such that, as the followers approach each other, the friction members C-C 4will be separated in a direction at right angles to the axis ol the gear,

To resist the separating; movement of the members C-C and consequently resist apm nroach et the followers ltd-fi?, the bolts lli-l are extended vertically through suit-- able pertorations in thelriction members C-C and elongated perl'orations 23--23 in the flanges Zijl-17. 'lhe bolts D are disposed on opposite sides oi? the yoke 'il so as to avoid cutting away anv of the metal of the latter and on each bolt D is moaiited an upper spring follower 24 and a lower springu follower F25, one of the springs l beine; con

dried between each pair oil' followers 2l and rlhe upper followers 24 are provided with sleeve portions 26 which extend past the. lower arm of the yoke and bearagainst the under lace of the lower friction inem ber C.

ln operation, in batting, the t'ront follower ll will be forced rearwardly while the rear follower llt islield stationary, This relative increment will therefore cause friction to be generated between the engaging trion tion surfaces 18-18 ol' the flanges 1l'. Similarly, friction will be generated between the till d li

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engaging wedge faces ofthe wedges B and C while the latter are being forced apart. ln addition to the foregoing, friction will be generated between one of the front wedges B and the flange 17 of the rear follower and between one of the rear wedges B and the flange 17 of the front follower A. As will be understood, the springs E acting upon the friction members C-C will tend to resist the relative approach of the followers and will also serve to return the parts to normal after pressure on the followers is released.

I have shown the arrangement with the springs mounted below the draft sills and the bolts eatending,r vertically. but as will be understood by those skilled in the art, the arrangement may be turned through an angle of 90o and have the springs extending horizontally on the outer sides of the draft sills.

lt is evident from the preceding description that the followers, wedges and friction members may all ie manufactured cheaply and in quantities as castings at relatively small expense. A large amount of friction wearing area obtained and a high capacity of shock absorbing mechanism produced. The arrangement is also compact. easy to assemble, and the parts so related that upon release. all elements will be returned to their normal proper position.

l claim:

l; ln a friction shock absorbing mechanism. the combination with relatively movable end followershaving` inwardly extended overlapi'iing flanges in sliding frictional engagement. of oppositely arranged wedges on each of said followers. friction members on opposite sides of the overlapping flanges and engageable with said wedges. and springY means for resistino` relative ai'n'iroaeh of .said followers and acting;r through said friction niembers.

2. lin a friction shock absorbing mechanism. the combination with a pair of relatively movable followers, lof a friction member reovable in unison with each follower. said friction members beine' overlapped -and frictionally engairinc. additional friction menil'iers and cofii'ierable wedges relativelv movable upon relative approach of said followers and actionr to force .said first named friction members into engagement with each other. and spring means for resistingh relative approach of the followers il. ln friction shock absorbinfr mechanism. tbeapn'ibination with a pair of followers havin;i overla'ming flanges in frictional engagement, of wedges associated with said followers and movable toward each other upon relative approach of the followers, friction members having wedgeshaped ends coperable with said wedges and relatively separable in a direction at right angles to the line of relative moven'ient. of said followers, and spring means for preventing relative separation of said friction members.

4. In a friction shoclc absorbing mechanism, the combination with duplicate followers, cach having an integral flange, the flanges being overlapped and in sliding frictional engagement. of two wedges mounted on the inner face of each follower, one wedge of each pair beineY in` sliding engagement with the flange of the opposite follower, friction members on each side of said flanges and coperable with said wedges, said frietion members being relatively separable upon approach of the followers, and spring means for resistingv said separation of the, friction members.

ln a friction shock absorbing mechanism, the combination. with duplicate followers, each having an inteeral flange. the flanges being' overlapped and in sliding frictional engagement. of two wedges mounted on the inner face of each follower. one wedge of each pair being in slidingr engagement with the flange of the opposite follower. vfriction members on each side of said flanges and coperable with said wedges. said friction members being relatively separable upon approach of the followers. and spring` means for resisting said separation of the friction members. said spring means including bolts extending' through alined perforations in said friction members and overlapping flanges and springs mounted on said bolts.

tl. In a railway draft rigging, the combination with draft sills, draw bar, and yoh'eactingr means, of front and rear followers having overlapping flanges in sliding frietional engamment. said flanges extending parallel to the. axis of the, gear.l a pair of wedges detachablv mounted on the inner face of each of said followers. one, wedge ol' each pair being in frictional engagement with the flange of the opposed follower. friction members coc'ipcrable with said wedges and .separable at rightA angle-1 to the avis of thc gear upon relative approach of the follow. ers. and springp means acting through said friction members for resisting relative approach of the followers.

ln witness that l claim the foregoing l have hereunto subscribed my name this lst; day of Mar., UHR.

GEORGE A. JOHNSON.

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